From 3418d72404e35eb19e7995cbf3e7a76ba8fefbce Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 29 Jun 2006 02:24:49 -0700
Subject: [PATCH] genirq: add IRQ_NOPROBE support

Introduce IRQ_NOPROBE: enables platforms to control chip-probing.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 kernel/irq/manage.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'kernel/irq/manage.c')

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index cffde4843897..90a944a7fadc 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -118,6 +118,10 @@ void enable_irq(unsigned int irq)
 		WARN_ON(1);
 		break;
 	case 1: {
+		unsigned int status = desc->status & ~IRQ_DISABLED;
+
+		/* Prevent probing on this irq: */
+		desc->status = status | IRQ_NOPROBE;
 		check_irq_resend(desc, irq);
 		/* fall-through */
 	}
-- 
cgit v1.2.3